Portion of heat treat furnace



FIG. 1 is a perspective view of a portion of the heat treat furnace;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof; and

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is an enlarged sectional view taken along the line 8-8 of FIG. 6 thereof.

The broken lines showing on the drawing disclosure are for illustrative purposes only and form no part of the claimed design. 

We claim, the ornamental design for a portion of heat treat furnace, as shown and described. 